Dieses Bild von NGC 7390, auch bekannt als der Zauberer-Nebel, wurde mit einem Celestron C9.25 SC XLT-Teleskop in Kombination mit einer ZWO ASI2600MM Pro-Kamera, montiert auf einem ZWO AM5N, aufgenommen. Die Gesamtintegrationszeit betrug 7 Stunden und 25 Minuten, wobei die Belichtungszeiten nach Filter unterteilt wurden: 5 Minuten für Rot, Grün und Blau; 1 Stunde für Hα; 2 Stunden und 55 Minuten für SII; und 3 Stunden und 15 Minuten für OIII.
Zur Unterstützung wurde ein Starizona SCT Corrector 0.63x IV, ein ZWO EFW 7 x 2″-Filterrad mit Pegasus Astro-Filtern bestückt, sowie ein ZWO OAG-L zur Führung eingesetzt, allesamt über einen ZWO ASIAIR Plus gesteuert. Die Nachbearbeitung erfolgte in PixInsight, mit zusätzlichen Verfeinerungen mithilfe von Russell Croman’s BlurXTerminator, NoiseXTerminator und StarXTerminator. Das Bild in Originalauflösung ist auf AstroBin zum Anschauen verfügbar.
Incredible detail with a perfect balance of sharpness, resolution, and color. Excellent work!
Since I started binning my ASI2600MM to increase my image scale to 1″, processing has become much easier. While it was interesting to work at 0.4″ with the ASI 585, this method is faster and more efficient, and I don’t plan on switching back. This is especially true given how infrequently I get clear skies.
Nice capture. The key takeaway for me is the 1:3 ratio of Ha to Oiii/Sii.
One advantage of mono imaging is the ability to tailor exposure time to signal strength, particularly with narrowband. While this varies by object, Ha is almost always the strongest signal. For Sii and Oiii, you can estimate by taking a long subexposure to gauge how faint each channel appears.
I’m also interested in the Sii-Oiii acquisition time, as I recently purchased a 7nm filter for it.
I must say, you and u/TigerinKS are to blame for this purchase. You’ve influenced my spending decisions.
My second favorite part of astrophotography is spending other people’s money.
If you’re willing to invest more, I’d suggest going mono with a full set of 7 Pegasus filters.
Even without switching to mono, be sure to stretch and darken your channels individually and adjust the color balance when recombining them.
Thank you for the tip.
Given the weather conditions here, using a mono camera will mean it takes me a very long time to gather enough data for any target.
Mono imaging isn’t slower—in fact, it’s generally faster for narrowband work. Using narrowband filters with a Bayer matrix is quite inefficient. Of course, you don’t need to pursue this approach, but I understand your weather challenges, and switching to mono has been beneficial for me too.
Maybe one day I’ll upgrade to a mono camera, but for now, this will do.
This is a stunning image of the Wizard Nebula.
Thank you!